Irwin® Unibit® Step Drill Bit, Metric, NO 5MT, 5 mm Minimum Hole Dia, 35 mm Maximum Hole Dia, 13 Steps, 2 - 3 mm Step Depth, 1 Flutes, 7/16 in Shank, Hex Shank, SpeedPoint® Point, HSS Cutting Edge, HSS, TiN Coated, Applicable Materials: Ferrous, Non-Ferrous Materials, Stainless Steel, Copper, Brass, Aluminum, Plastic and Wood
- HSS provides good wear resistance and can be used in general purpose applications on both ferrous and non-ferrous materials
- Titanium nitride coating resists heat and friction, extending the cutting edge life up to six times longer than other high speed steel step drill bits
- The heat and hardness resistance allows the tool to run at higher speeds than uncoated tools
- Round shanks with flats are ground flat on three sides for increased chuck grip, reducing slippage and help centering the drill in the chuck
- They are used with portable drills and drill presses on ferrous and non-ferrous materials
- Single-flute cutting edge for greater control through steps
- 3-Flatted shank prevents slipping in drill chuck
- Hex shank prevents slipping in drill chuck
- Geometry of single-flute cutting edge drills true, round holes and provides maximum step control
- Laser-etched sizes inside flute for easy and permanent hole size identification